Emergency HVAC Repair in Houston: 24/7 Service for AC, Heating & Commercial
Your AC quits at 2am. A furnace won’t ignite on the coldest night of the year. A rooftop unit at a Heights restaurant gives up halfway through the lunch rush. Emergency HVAC repair isn’t really about being open 24/7 — almost every Houston shop claims that. The thing that matters at 2am is whether a Houston-based dispatcher picks up the phone, whether the truck has the parts on board, and whether the company is going to charge you double because it’s a Saturday.
75 Degree AC has been operating in Houston since 2016. License TACLA72152E. Every dispatched technician carries EPA Section 608 Universal. Trucks stocked for Carrier, Trane, Lennox, Goodman, Rheem, American Standard, Daikin, Mitsubishi, Bryant, and York. Residential split systems, gas furnaces, heat pumps, and light-commercial rooftop work.
- TACLA72152E (Class A) — verify at tdlr.texas.gov
- EPA Section 608 Universal certified technicians
- 24/7 dispatch — no after-hours surcharge
- 90-minute target inside Loop 610
- Same-day in Katy, Sugar Land, Cypress
When Is It Really an HVAC Emergency?
An HVAC emergency is any failure that puts health, safety, or property at risk. Sparks, burning smells, water on the ceiling, a furnace tripping a CO detector — those are obvious. The harder calls are the ones in the middle.
Stop-everything signs — call us immediately:
- Burning smell from a vent or near the indoor unit
- Sparks, smoke, or visible flame at the air handler or condenser
- Suspected gas odor near a furnace (leave the home, call CenterPoint at 713.659.2111, then call us)
- Carbon monoxide detector triggering near the furnace
- Breaker that trips again the moment the system tries to restart
- Water pouring from the indoor unit onto ceiling, drywall, or flooring
- Refrigerant leak you can smell (sweet, ether-like) or see (oily residue near coils)
What an Emergency Call Looks Like With Us
We target a 90-minute response window inside Loop 610 and same-day dispatch in the suburbs. During a heat dome or the week after a derecho, both numbers stretch — we tell you the honest ETA when you call.
When the call lands, dispatch confirms your address and the symptom. You get a text with the technician’s name, photo, and ETA. Our trucks carry capacitors (3–80 µF), contactors (24V/240V), condenser fan motors, ECM and PSC blower motors, hot-surface igniters, flame sensors, gas valves, control boards, drain-clearing equipment, manifold gauges, and R-410A, R-454B, and R-32 refrigerant. Most calls finish on the first visit.
No after-hours, weekend, or holiday surcharge. The diagnostic fee at 2am on a Saturday is the same as the diagnostic fee at 10am on a Tuesday. No fuel surcharge, no trip add-on, no overtime premium.
- Texas TACLA72152E — Class A, any tonnage
- EPA Section 608 Universal — every dispatched tech
- Fully insured and bonded
- Founded in Houston, 2016
- 30-day same-issue callback warranty
- One-year labor warranty on emergency repairs
Common Emergency Repairs in Houston
What actually fails in a Houston summer — six failure modes that cover the bulk of our emergency call volume, with typical 2026 repair pricing. Most resolve on the first visit because the part is on the truck.
Run Capacitor
The #1 Houston summer emergency. Compressor strains to start, contactor chatters, breaker trips. Typical repair $150–$350, same visit. We carry 3–80 µF capacitors on every truck.
Contactor (24V / 240V)
The relay that closes when the thermostat calls for cooling. When it pits and welds, the outdoor unit stays silent. $200–$400 typical.
Refrigerant Leak + Frozen Coil
Low charge freezes the evaporator. We find the leak, repair it, and recharge with the correct refrigerant — R-410A, R-454B, or R-32 depending on system age.
Clogged Condensate Drain
Probably the #1 "AC won't turn on" call here June–September. Drain clogs, float switch lifts, system shuts off. Clear the drain, reset the switch. Often under $200.
Condenser Fan Motor
Outdoor fan stops, compressor overheats and locks out. $450–$900 with the motor stocked on the truck.
Post-Storm Capacitor Failure
When CenterPoint restores power after a storm, the voltage transient often takes out the run capacitor. Wait 5–10 minutes before forcing a restart. Almost always a $200–$350 fix, not an $1,800 compressor.
Houston HVAC Emergency? Call Now
Emergency Furnace and Heating Repair
Heating emergencies are rarer than AC emergencies here. Winter Storm Uri in February 2021 made the point, though. We keep furnace and heat pump components stocked year-round.
Gas furnace emergencies
- Hot-surface igniter failure — no ignition cycle, fault code on the board. $175–$400.
- Flame sensor failure — furnace fires for 30–90 seconds, then locks out. $100–$300.
- Gas valve failure — fuel can’t reach the burner. $500–$3,000. On an older furnace this often becomes a replacement conversation.
- Cracked heat exchanger — safety issue, not a comfort issue. A crack can vent CO into the supply air. Replacement $1,500–$3,000.
- Suspected gas leak — leave the house, don’t flip light switches. Call CenterPoint at 713.659.2111 from outside. Once safe, call us at (713) 598-2737.
Heat pump emergencies
- Reversing valve failure — stuck in cooling (no heat) or heating (no cooling). $700–$1,500.
- Defrost board failure — outdoor unit ices up, system can’t clear frost cycle, room-temperature air at the registers. $300–$700.
- Low refrigerant in heating mode — heat pumps need a full charge to deliver rated heat at low outdoor temps. A leak that’s tolerable in August becomes obvious the first night below 45°F.
HVAC Brands and Models We Service in the Field
A lot of Houston competitor pages say “all major brands” and stop there. That’s not useful when you’re standing next to a humming Lennox SL28XCV at 11pm wondering whether the tech you called has actually opened one before. If your unit isn’t on this list, call (713) 598-2737 — we probably still service it.
| Brand | Specific Models | Refrigerant |
|---|---|---|
| Carrier | Infinity 24ANB7, Performance 24ACC6, Comfort 24ABB3 | R-454B / R-410A |
| Trane | XV20i, XR16, XL18i | R-454B / R-410A |
| Lennox | Signature SL28XCV, Elite XC25, Merit ML17XC1 | R-454B / R-410A |
| Goodman | GSXC18, GSX16, GSX14 | R-454B / R-410A |
| Rheem | Prestige RA20, Classic Plus RA17, Classic RA14 | R-454B / R-410A |
| American Standard | Platinum 18, Gold XV, Silver 14 | R-454B / R-410A |
| Daikin | Fit, 19 Series (DX9VS), MXS multi-zone | R-32 |
| Mitsubishi Electric | M-Series, P-Series, Hyper-Heat H2i | R-32 / R-454B |
| Fujitsu | Halcyon HFI, RLS3H | R-32 |
| LG | LMU multi-zone, Multi F MAX | R-32 |
| Bryant | Evolution 189BNV, Preferred, Legacy | R-454B / R-410A |
| York / Coleman | Affinity, Echelon LX, Latitude | R-454B / R-410A |
Every dispatched tech carries EPA Section 608 Universal — federally required for handling refrigerant. We keep R-410A, R-454B, and R-32 on every truck. Since January 2025, new HVAC equipment can no longer ship with R-410A; existing R-410A systems can still be serviced. R-410A wholesale in 2026 runs $12–$18 per pound, roughly triple the 2024 price. We disclose the per-pound rate before adding any refrigerant.
What an Emergency HVAC Call Actually Costs in Houston (2026)
Most residential emergency HVAC calls in Houston land between $250 and $1,500 all-in, including the diagnostic fee. Where Houston really diverges from most metros is the after-hours markup — most contractors here charge 1.5× to 2× standard daytime rates between 6pm and 7am. We don’t.
| Component | Price Range |
|---|---|
| Run capacitor (single or dual) | $150 – $350 |
| Contactor (24V or 240V) | $200 – $400 |
| Furnace hot-surface igniter | $175 – $400 |
| Furnace flame sensor | $100 – $300 |
| Furnace gas valve | $500 – $3,000 |
| Furnace control board | $300 – $1,200 |
| Heat exchanger | $1,500 – $3,000 |
| Condenser fan motor | $450 – $900 |
| ECM blower motor | $650 – $1,200 |
| Compressor (single-stage) | $1,800 – $3,200 |
| Compressor (variable-speed) | $2,800 – $4,800 |
| Reversing valve (heat pump) | $700 – $1,500 |
| R-410A refrigerant (2026 wholesale) | $12 – $18 / lb |
| Drain clearing + float switch reset | Often under $200 |
Repair or replace?
Industry rule of thumb: multiply system age by repair cost. If the result is over $5,000, replacement starts to make sense. Texas falls in the DOE South Region — minimum SEER2 for split-system AC under 45,000 BTU is 14.3. If your system is 12+ years old and the emergency repair is $1,500+, we’ll put both numbers in front of you and let you decide.
CenterPoint rebates if the call leads to replacement
CenterPoint Energy offers up to $500 on qualifying ENERGY STAR heat pumps and $75 on connected smart thermostats. We apply both directly to your invoice as a CenterPoint-approved contractor. No paperwork on your end.
Commercial HVAC Emergency Service
Light-commercial systems fail differently than residential. A walk-in cooler quits at a restaurant and the food-safety clock starts at hour 12. A rooftop unit on a medical office loses cooling and patient appointments stop. We dispatch separately for commercial, with priority routing for medical offices, restaurants with perishable inventory, and multi-tenant buildings.
- Light-commercial split systems (residential-style equipment in commercial use)
- Rooftop package units (RTU) on offices, retail strips, restaurants
- Dedicated outdoor air systems (DOAS) and make-up air units
- Mini-split commercial in retrofit applications
- Commercial heat pumps
Scope is light commercial. For industrial systems above 25 tons, we coordinate with our commercial partner network — call (713) 598-2737 to confirm fit. Itemized invoices to LLC or property-management billing on request. Property managers running multiple Houston buildings can set up a fast-track contact pattern that bypasses standard intake.
Houston Climate and Seasonal Emergency Patterns
Houston averages 108+ days above 95°F per year (NOAA HGX baseline). Cooling emergencies cluster June through August; heating emergencies cluster the two or three coldest weeks of the year, usually mid-December through late January.
Summer peak. Heat dome events push call volume to the annual peak. Capacitor failures spike — capacitors die more often as ambient air heats up, and Houston spends August well outside their rated thermal envelope.
Winter cold snaps. Houston winter is mild on average, and that’s the problem. The two or three weeks each year that actually drop below 30°F catch furnaces that ran fine in November. Winter Storm Uri tripled our heating-call volume in a single week.
Storm season. We worked through the Hurricane Beryl outage week of July 2024 and the May 2024 derecho restoration window. When CenterPoint restores power, voltage transients cause Houston-wide capacitor failures. Tuesday-after-restoration call volume runs 5–10× a normal Tuesday.
Greater Houston HVAC Emergency Coverage
We dispatch from 4800 W 34th St in Northwest Houston. Inside Loop 610: 90-minute response target. Greater Houston suburbs (Katy, Sugar Land, Cypress, The Woodlands, Spring, Tomball, Missouri City, Richmond, Pearland, Stafford, Friendswood, League City, Humble, Kingwood, Atascocita): same-day target during business hours, same-day-or-next-morning on overnight calls depending on volume. Richmond, Sugar Land, and Katy have dedicated route coverage.
Houston HVAC Emergency Credentials
License TACLA72152E (Class A). Our Texas Air Conditioning License authorizes residential and commercial HVAC work at any tonnage. Verify it free at tdlr.texas.gov/LicenseSearch — search by license number or by business name “75 Degree AC.”
EPA Section 608 Universal on every dispatched tech. Federally required for handling refrigerant in any HVAC repair. Cert card lives in the service vehicle, available on request.
Fully insured and bonded. Carriers and coverage amounts available on request.
Houston-local since 2016. Dispatch base at 4800 W 34th St, Ste C50F, Houston, TX 77092. The reviews and the reputation are tied to ZIP codes our team has worked in for nearly a decade. We’re not a franchise. We’re a Houston shop that grew because Houston customers kept calling back.
- Expert installation by licensed Houston technicians
- Energy-efficient systems to lower your bills
- Quick and reliable AC replacement service
- Compatible with all major AC brands and models
- Preventive advice to maximize system lifespan
What Our Customers Are Saying
Outstanding AC service. They fixed my cooling issue the same day and explained everything clearly. As a realtor, I rely on dependable contractors, these guys are truly reliable.
Recent AC Service Projects We Serve
Take a look at some of our recent AC service projects across Houston. We proudly provide expert installation, repair, and maintenance services to homes and businesses, ensuring comfort and satisfaction in every job we handle.
Frequently Asked Questions
Common questions about emergency HVAC repair in Houston — response time, pricing, brands, and how dispatch actually works at 2am.
What counts as an HVAC emergency?
Any failure that puts health, safety, or property at risk. The obvious ones: total cooling loss above 95°F with a vulnerable family member in the home, no heat below 40°F, burning smell or smoke, repeated breaker trips, suspected gas or CO leak, refrigerant leak, water pouring from an indoor unit. If you smell gas, leave the house and call CenterPoint Energy’s gas line (713.659.2111) before calling us. Otherwise call (713) 598-2737.
How fast can you actually be at my Houston home?
We target a 90-minute response window inside Loop 610 and same-day dispatch for Katy, Sugar Land, Cypress, Spring, The Woodlands, Tomball, Missouri City, and Richmond. You’ll get a text with the tech’s name, photo, and ETA. During peak weather events (heat dome week, post-derecho restoration), the window stretches — we tell you the honest ETA at the time of your call instead of promising and missing.
Do you charge extra for nights, weekends, or holidays?
No. The diagnostic fee at 2am on a Saturday is the same as the diagnostic fee at 10am on a Tuesday. No fuel surcharge, no trip add-on, no overtime premium. The diagnostic fee credits toward the repair if you authorize work.
Will the technician have parts on the truck?
Most calls finish on the first visit. Trucks carry capacitors (3–80 µF), contactors (24V and 240V), condenser fan motors, ECM and PSC blower motors, hot-surface igniters, flame sensors, gas valves, control boards, drain-clearing equipment, manifold gauges, and R-410A, R-454B, and R-32 refrigerant. If a major part needs to be sourced, we put the next-visit ETA in writing before we leave the property — no second-trip charge.
What's the typical cost for an emergency HVAC call in Houston?
Most residential emergencies land between $250 and $1,500 total, diagnostic included. Capacitor $150–$350. Contactor $200–$400. Furnace igniter $175–$400. Compressor $1,800–$3,200. Heat exchanger $1,500–$3,000. R-410A refrigerant currently $12–$18 per pound wholesale. The most common Houston “AC won’t turn on” call (clogged condensate drain + tripped float switch) is often under $200. Written estimate before work begins on every call.
What HVAC brands and systems do you service?
Carrier, Trane, Lennox, Goodman, Rheem, American Standard, Daikin, Mitsubishi Electric, Fujitsu, LG, Bryant, and York/Coleman. Split systems, packaged units, heat pumps, mini-splits, gas and electric furnaces, and light-commercial rooftop units. Every tech holds EPA Section 608 Universal.
Do you handle commercial HVAC emergencies?
Yes — we dispatch separately for commercial: light-commercial splits, RTUs, DOAS, make-up air, mini-split commercial. Property managers can set up a fast-track contact pattern that bypasses standard intake. Calls we handle regularly: restaurant walk-in coolers, medical-office cooling failures, retail tenant outages. We invoice to the LLC or property management company on request.
My breaker keeps tripping. Is this an emergency?
Yes. Stop resetting it. The breaker is doing exactly what it’s supposed to do — something downstream is drawing more current than the circuit is rated for. Common causes: failed run capacitor, shorted condenser fan motor, locked-up compressor, or a wiring fault at the outdoor disconnect. Continuing to reset can damage the compressor (an $1,800–$3,200 part) or start an electrical fire. Turn the system off at the thermostat, leave the breaker in the OFF position, and call (713) 598-2737.
Are you licensed in Texas? How can I verify?
Yes. Our Texas Air Conditioning License is TACLA72152E, Class A — authorizing residential and commercial HVAC work at any tonnage. Verify at tdlr.texas.gov/LicenseSearch by license number or by business name “75 Degree AC.” Every dispatched tech also holds EPA Section 608 Universal.
Will I get a written estimate before any work starts?
Yes. Every emergency call gets a written estimate before work begins. The tech runs diagnostics (capacitor microfarad check with a Fieldpiece tester, manifold gauge readings, multimeter voltage and continuity), identifies the failed component, and shows you the reading or the failed part itself. Then you get the estimate with parts and labor broken out. You authorize before we start. No surprise upsells, no high-pressure replacement pitch.